File Description:Grantley Adams International Airport (GAIA), (IATA: BGI, ICAO: TBPB) is found in Seawell, Christ Church on the island of Barbados. The former name of the airport was Seawell Airport before being dedicated in honour of the first Premier of Barbados, Sir Grantley Herbert Adams in 1976. The airport's timezone is GMT Ã¢Â�Â�4, and is located in World Area Code region #246 (by the U.S. Department of Transportation). GAIA is the only designated port of entry for persons arriving and departing by air in Barbados.